Only the stepper half of #428 lands here. Its other half, the phone case
picker search, shipped separately in #488 (1.33.1) and is kept as it is on
master, so every file of this merge starts from ours and only the stepper
changes are ported onto it:
- index.html: the second `− 1 +` group (#shellCount) after Run Shell is gone.
- session-ui.js: incrementShellCount/decrementShellCount are removed and
runShell() reads the toolbar's one stepper through _readTabCount(), the
helper master grew since #428 was opened (same clamp and absent-element
fallback as #428's _toolbarInstanceCount()).
- run-mode-ui tests stub #tabCount instead of #shellCount, plus #428's
"toolbar instance count" block adapted to _readTabCount() and a markup check.
- wiki: "the instance counter", singular.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Codeman maintainer
f7a41b3fae